Adjustable transmission mechanism



A G. G. BAYNE.

ADlUSTABLE TRANSMISSION MECHANISM.

A. IIIIIIIIIIIIIIIII PR. Z 9 I 9 2 D. y 1341 5,512. Patented May 9, 1922.

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G. G. BAYNE.

ADJUSTABLE TRANSMISSION MCHANISM.

Patented 9.1922.

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` APPLICATION FILED APR-29, 1920.

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G. BAYNE.

ADJUSTABLE TRANSMISSION MECHANISM.

APPLICATION FILED APR.29. 1920.

1,415,512. Patented May 9, 1922.

3 SHEETS-SHEET 3.

@we @We 'T11-Jy [y- GEORGE e. EAYNE, or BUSHNELL, ILLINOIS, n ssieivon or oNELroUnrn roqoniq o.v

HOEHNEN, ONE-FOURTH TO CLEMENT NELL, ILLINOIS.

e. BRANSTRATQR,

Anp oivEmoUR/rir To' E AYNE MANUEACTURING COMPANY, A conro-nnrioii yor iLLVINors, erinnert. Y

ADJUSTABLE TRANSMISSION MECHANISM.

To all wlw/m, tf/nay concern Be it known that I, GEORGE G. BAYNE, a citizen of the United States, and a resident of Bushnell,`in the county of jMcDonough and State of Illinois, have invented certain new andusefui Improvements in an "idj ustable Transmission Mechanism; and I doliereby declare thatthe following is a.- full, clear, and exact descriptionof the same, reference .being had to .the accompanying drawingsand to the numerals of reference marked thereon, which forni a part of this specification.

My invention relates more specifically to a novel adjustment for Aa transmission mechanism whereby the driving power `is Vaffected byl a variation in the load'of a drawn ap p aratus. n

It is `anobject of my invention to devise a variable speed Ithat may be automatically .controlled by the load.

It is a further .object of my invention to provide a .locking means for the adjustable transmission, whichlis broken upon bitching a draw bar thereto.

.Other :objectsand Aadvantages reside in the novel.construction. and arrangement of inafter.

The invention (in a preferred form) is illustratedin the drawings and hereinafter morefully described..

-On vthe drawings: 1

Figure 1 is a part elevational and part sectional view, showing an intermittent friction drive .with which my invention is associa-ted.

Figure 2 Shows theapplication Iof Vmy vinvention toa tractor. l 'j j f Figure 3 fis a topview of Figure2.

Figure 4 is a view partlyuin section and partly in elevation showing. the draw bar connection.

Figure v5 is a view partly in section and partly .in .elevationshowing the means whereby the draw bar eifects on automatic adjustment.

l,parts as more specifically pointed Vout here- Figure 6 is a sectionon the line 6 6 of' Figure 4.

Figure 7 shows a base in section and the adjustable Julcruin for lthe lpower' levers.

As shown on ,the drawings Referring now vmore specificallyto the drawings, in which similar referenee'nu- Specification ofv Letters Patent.

Gained by 'bell `eral-1k tion 12 of each lever. j each section 12' is pivotedto a link 14. connected to disk 13uponshaft 1. A .plurality the power arm Patented May 9, 17922.

.ippiication filed April 29, i920. sei-iai no, 377,428.

mera-ls indicate the saine featuresinE .the diiferentviews, 1 is a driving shaft which may receive its power from any .convenient source ;l 2 is the drivenshaft which be i the rear ydiferential axle of a tractor or any other driven shaft. Motion is imparted to shaft 2 throughfa flanged vwheel 3 connected therewith; a. plurality of intermittent gripvadjustably fulcrumed gripping devices, tothe arms yot a bell cranklever 6 mounted on shaft 8, while `I the other j set is connected to the armsv lof a b ell crank leveri?. Bellcrank lever 6-is ospowerlever 4," while bell crank' 7 isvoscillated by noted that-as each bell vcra-'nk is oscillated, one gripping device of'each set isl effective on the forward.` stroke, and `the other 4ripping device iseifectivepon the 'backwar However/ structure is not la part of my 'invention, it is not necessary-)to enter into further detail in reference thereto.

y invention relates more particularly to te means for 'oscillatingshaft `8 whereby t e I employ two similar power levers, onev for `the* same. y section` 9 connected respectively. to'v bell cranks 6 andj7. Each for receiving ,the bifurcated end .ofthe seche o ppositeend of j stroke.. as thegrippingdevices with the bell Acraiil; levers vare oscillated; yWhile section t9 has a'pin 11 p ower lever 5. vIt 'will be y soi of disks 13 maybe used ifvjso desired. The

sections l2 ofthese levers have long slots 15 in which. a fulcrum pin 16 operates. If pin 16 is shifted tothe right the eifective stroke of lthe .gripping `members will increase, lwhile will be decreased. But if pin y16 is shifted to the left, the yeifective stroke of V.the gripping members will decrease while the power arin will increase. It should be notedthatthewsections of the vpower levers pivot on the axis l1 and form thereby a toggle lever asmshown .in fdotted vlines in Figure 1, and in order to keep the sections ofthe power levers in operative relationand cause `pivot 18 to.mover1n".an

arc to assist in breaking the toggle, a pair of bars 17 are pivoted at one end to the casing 19, and at the other end to pivot 18, as shown in Figures 1 and 2.

The fulcrum pin or shaft 16 is supported in a pair of journal members 20 carried by a bracket 21, which is firmly secured to a shaft 22, which is journalled in bearings 23 carried by the standards 24, which are suported on the floor of a vehicle or tractor.

y rotating shaft 22 by means of the crank 25 the fulcrum shaft 16 may be shifted.

By referring to Figures 2 and 5, it will be seen that crank 25 is connectedto shaft 26 by means of a link 27 and a crank 28, and that the rotation of shaft 26 will give a similar movement to shaft 22 to shift the fulcrum shaft 16. Shaft 26 may be rotated by means of a lever 29, having a hub 30 fitting rather loosely on shaft 26, the said lever extends below said shaft 26 and is connected to a crank arm 31, which is secured upon said shaft. The connection between lever 29 and crank 31 is of novel construction and comprises a hollow hub 32 having a fiange 36 at its outer end and threaded upon its inner end which is secured in an aperture in the lower part of crank 31; a pin 33, having an annular shoulder 34 intermediate its ends is mounted in said hub, and a spring 35 is placed between said shoulder and the iiange 36 of the hub. It will accordingly be seen that the spring 35 has a tendency to force the pin inwardly to bring the end 37 into an aperture 33 in the lever 29, whereby crank 31 and shaft 26 may be rotated by the lever. A locking segment 39 of well known construction may be used to hold lever 29 in its adjusted position.

L rather important feature of my invention exists in this connection between said lever 29 and crank arm 31, for it should be noted that pin 33 has a head 39a whereby the pin 33 may be withdrawn from lever 29 and held in such withdrawn position by means of a draw bar 40, which has a yoke 41 at its forward end to straddle the pin 33. The draw bar may be made of a plurality of sections pivoted together at 42, to allow slight relative movement. rlhe bar` may be slidably supported in a bracket 44 in advance of which a nut 43 is screw threaded upon said draw bar, and a strong spring 45 inserted between the said bracket and nut. rllhis spring, it is contemplated, will resist the average force imparted to the draw bar from a vehicle or implement that it may be towing. But if the pressure of the spring should be overcome for any of the various causes, such as mud or sand or obstructions, the said spring will yield, and the crank arm 31 will be rotated to the right whereby the fulcrum shaft 16 will be shifted through the above described mechanism so as to increase the power arm and reduce the stroke arm.

The operation is as follows:

es my invention is preferably adaptable for use on a tractor or vehicle, I have shown it mounted on a tractor. Any motor lor engine may be used to impart motion to the gear wheels 46 and 47 to causev rotation thereof. rlhe power levers 4 and 5 may be connected to the shaft of gear 47 by any appropriate means such as disks 13. As the said shaft rotates, sections 12 will fulcrum on shaft 16 and pivot 18 will ascend on a radius of bar 17 the sections 9 and 12 of the levers breaking in toggle like fashion, sections 9 operating the gripping devices and thus imparting rotation to the driven shaft. The fulcrum shaft 16 may be adjusted at any time by means of lever 29. But when it is desired to tow a vehicle or implement, pin 33 is withdrawn from lever 29 and the draw bar yoke placed over said pin, at which point the adjustment of fulcrum shaft 16 becomes automatic through the spring 45. When spring 45 yields, a pull will be imparted to crank 31 and through the aforedescribed mechanism, fulcrum shaft will be adjusted to increase the power arm and decrease the effective stroke of the gripping members.

lt will accordingly be seen that I have invented an adjustable power transmission which is manually adjustable under certain conditions and automatically adjustable under other conditions, and that the automatic adjustment responds to the variation of loads, the power arm increasing with an increase of load.

I am aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and l therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. The combination with a tractor, of a variable driving means therefor comprising a manually shiftable lever for varying said driving means, and means for rendering said lever inoperative and causing an automatic adjustment of said driving means.

2. The combination with the driving mechanism of a tractor, of manually adjustable means for varying the speed of said driving mechanism, a device for rendering said manually adjustable means inoperative, and a draw bar adapted to be connected to said means and adapted to hold said device in an inoperative position.

3. In a device of the class described, a power lever, a shiftable fulcrum therefor, means for manually shifting said fulcrum, a draw bar adapted to tow an apparatus, and adapted for attachment to said means, and means responsive to the pull of the draw bar for automatically shiftingv said fulcrum.

4. In a device of the class described, the

combination with the driving mechanism of a tractor, of a lever connected to said mechanism for varying the speed thereof, means for breaking the connection between said lever and mechanism, a draw bar adapted for attachment to said means, and means responsive to the pull on said draw bar for automatically varying the speed of said driving mechanism. y

5. The combination With a tractor, of variable speed driving means therefor comprising an operating lever for the driving means, a shiftable fulcrum for said lever, a draw bar, a yielding abutment for said draw bar, and means for connecting said fulcrum and dravv bar for varying the position of said lulcrum according to the load on said draw 6. In a tractor transmission, an intermittent driving mechanism, comprising a rotary driving member, pavvls cooperating therewith, a lever for operating said paWls, a shiftable fulcrum for said lever, a yieldingly supported draw bar, and means for connecting said fulcrum and dravv bar for varying the position of said fulcrum according to the load on the draw bar.

, 7. In a tractor transmission, a rotary member, pawls cooperating With said member, a lever for operating said pavvls, a shiftable fulcrnm for said lever, a control lever, a draw bar, and means for optionally .connecting said lever or draw bar to said shiftable fnlcrum.

8. In a tractor transmission, variable speed driving mechanism, means for varying the speed of said transmission comprising a conv `trol lever having a shiftable connection, a

position and hold said control lever inoperative.

In testimony whereof I have hereunto subscribed my name in the presence of tWo subscribing witnesses.

GEORGE G. BAYNE.

Witnesses: i'

G. K. COOPER, N. HINMAN. 

